Vacuum-cleaner pump.



C. O. WILLIAMS.

VACUUM CLEANER PUMP.

APPLICATION FILED APR. 30, 1912.

1 72,547, Patented Sept. 9, 1913.

3 SHEETS-SHBET l.

COLUMBIA PLANOGRAPH 60., WASHINGTON, D. c.

G. G. WILLIAMS.

VACUUM CLEANER PUMP.

APPLICATION FILED APR. 30, 1912.

Patented Sept. 9, 1913.

3 SHEETS-SHEET 2.

awuwwtov C. C PVz'ZZZlczm COLUMBIA PLANOGRAPH c0.. WASHINGTON. D c.

C. C. WILLIAMS.

VACUUM CLEANER PUMP. APPLICATION FILED APR.30, 1912.

Patented Sept. 9, 1913.

3 SHEE TSSHEET 3.

C C WZZzkwza "EUM'TEED STATES: rares s g CALVIN c. water ne orsnILAnELrnrA, tnnwsrnvaarra ssamese. time vacuum: oLnAnI-Ns GQMPATAIY,0E Entitlements,'r'nImsYLvAnIe- 1 vAc n ntnAnEn PUMP.

' by the movement ofthe vacuum cleaner.

The prlrnary object f ny' invention is to provide a cleaner with apositive va u creating pump of such character that it will not readilyget out of order, and in which wear will be reduced to a minimum.

A further object is to provide a cleaner of this character which isextremely compact in form for the reason that the purnpis containedwithin and forms part pfthe traction member or roller and is actuated bycanes carried by and rotatable With the roller.

A further object is to provide means whereby a dustrproof joint beformed between the casing of the collecting chamber and the pump, thisjoint being so arranged that all wearrnay be taken up,

A further object is toprovide a vacnnm cleaner of this character whereinthe point of application of the handle may be changed so that more orless force may be applied to the head forming the end of the dustcollect ing casing and thus the head either be allowed to rest of itsown weight upon the a p r i view of the t c ms seem ated om ach th a dQ-m t e ro l r proper. Fig. 6 is aperspective detail view or tl1e,headform. g the end wall.

firscifi s i f L te s at n Application filed, April- 30, 1912. SerialNo. eaa o.

' Corresponding and like parts are referred to in the ,fbllflwingdescription and indicated ,2 by th Sam re erence characters. 7 a

the dust collecting chamber which preferably has thevjfo-rrn otacylindrical casing 911 1 at ens encl, this mien end bei g formed Wit n adly Pr tin flanges?) dispo e inward of t e extremity of the asi g" nd fami g a sea-t to a asket o packin t e l, Inserti'ble int-Q the seat thusformed and against the packing ring L is a cleaner head head has acircular portion designated 6 which is circular so as to fit within theopen end of the dust-collecting easing 2 and which is forin'edwith thedownwardly extending duct 7, this duct flaring at its lower ll de signedto engage over lugs 12 formed Q'f Opposite points in the diameter of thecasing '2. This bowed clamp arches over the end of the l ner h an p sitll't ua'h the middl of the clamp is a l mp screw which engages againstthe middle of the head and forces it inward against the asket Heldbetween the gaskets; and the flange 3, is the margin ofadust-r-collecting-bag 14 of fine enough rnesh to catch any dust whichmay be drawn intofthecollecting chamber chamber creasing and at'thefrearend there- .of are therearwardly extending laterally opening ducts' l 5Theseductsfiare toward their outer ends, that is, are inwardly taper'ed.

a P1111111)! cylinder designated I generally 16 Gildand being providedat its extremity with wi th inwa d tam d erm na P r i which may be madeof any suitable material casing Formed with the collecting and compr sie ba e 1? an 'h n plates 18. The barrel 17 is preferably Patented Sent.9,

in' all the views ofthe accompanying drawshown n etail i in- 6- T e ne lThe vacuum-creating mechanism: includes formed at its ends with theoutwardly turned flanges 19 to which the end plates are attached bymeans of screws or in any other suitable manner; Disposed within thebarrel are the double pistons 20 connected Fig. 3 have inwardly turnedextremities 25 which project into the openings 22 and engage with thewalls 23. The opposite ends of thelducts, that is, the forward endsthereof have inwardly turned nozzles 26 which are tapered and fit snuglyin the flaring ends of the ducts 15. The forward ends of the ducts 24are provided with the forwardly projecting lugs 27 and these lugsareheld in engagement with the rear end of the dust collecting chamber 2by means of screws 28, these screws passing through the lugs 27 and intothickened portions of the wall of the dust collector 2. By tightening upon these screws, the terminal ends 26 of the ducts may be forced intodust-proof engagement with the ducts l5 and all wear may be taken up. Atthe same time by removing these screws 28, the ducts 24 may be readilydisconnected both from the pump and the dust-collecting cylinder and themachine disassembled.

For the purpose of operating the, pump, I provide a traction member intheform of a roller adapted to rest upon the floor and within which thepump is inclosed. This roller consists primarily of an annulusdesignated 29 and of oppositely disposed cams 30 and 31 which arecomplementary to each other. These cams 30 and 31 are of skeletonformation so as to make them as light as possible, and are provided withlugs 32. The annulus 29 is also provided with inwardly extending lugs 33engaging with the lugs 32. Screws 34 pass through the lugs and hold theannulus in proper relation to the cams. There are two of these cammembers each approximately cylindrical in cross section but having camfaces 35 on their inner ends.- Asillustrated these cam faces have theform of a sine-curve and are spaced apart just sufficient to permit thepassage of a roller as will be later stated. Each of the cammembers 30and 31 is provided on its outer end with the transversely extending bars36 carrying an annular hub 37. This annular hub is just large enough tofit around the outwardly projecting walls 23 of the openings 22 as shownin Fig. 3 so that these. walls 23 form bearings upon whiclrthe hubs"37rotate. will be of course understood that any sort of antifrictiondevices might be disposed between the hub 37 and the annular wall 23 ifdesired.

Passing transversely through the spindle 21 which connects the plstons20 1s a sp ndle 38, which splndle 1s pinned or otherwise connected tothe spindle 21, and the ends of the spindle 38 project out throughlongitudinal slots 39 formed in opposite portions of the barrel 17 asillustrated in Fig. 3.

Mounted upon the ends of the spindle 38 are the rollers 40,.whichrollers are held in place in any suitable manner as for instance by thepins 41. These rollers 40 bear against the cam faces 35, and it will beobvious that as the cams 30 and 31 rotate with the annulus 29, the camswill act to reciprocate the rollers 40, the spindle 38 and the pistons20.

It is of course necessary to provide valves for controlling the inlet ofair and the discharge of air from the pump cylinder, and to this end Iprovide inlet valves designated 41 which are seated in a valve seatformed in the ends 18 of the pump cylinder these valves being held inplace each by means of a spring 42 attached to the end 18 by means of ascrew or other suitable device 43. It will be seen that when theadjacent piston moves away from the valve 41, the valve will open andthe air will be drawn into the pump cylinder from the interior of thechamber or casing 2. An exhaust valve opening is also provided in eachend wall 18, this opening being designated 44 and having a valve seatformed on the exterior of the end plate. Disposed in this valve seat isa valve 45 held closed by means of a spring 46. The spring 42 and thespring 46 are of similar construction, that is, each is coiled at oneend so as .to bear against the face of the valve. The spring 46 isattached. to the outer ends of the wall 18 by means of a screw 47 or inany other suitable manner. It will be seen that when the pistonapproaches the valve 45, this valve will open and air contained withinthe cylinder will be forced out.

WVhile I may provide any suitable handle whereby this device may beoperated, I have illustrated the handle 48 which has a bifurcated orforked lower end, the legs 49 of which are yieldable and formed at theirextremities with inwardly turned terminal portions 50, these terminalportions engaging in socket-s 51 formed in the outer faces of the ducts24, the ducts being thickened at this point for the purpose. Preferablythere are a plurality of these socket-s 51 and I have shown three ofsuch sockets. This permits the handle to be shifted farther forward orfarther back so as to change the leverage exerted upon thedust-collecting casing 2 and therefore upon the head 5 by means of thehandle. Thus when the handle is disposed in the rearmost socket 51 butlittle force will be exerted upon the vacuum head and the head will restupon the floor by its own weight. Where, however, it is pump.

necessary that considerable force shou d be e erted, then the ork o thand is h t 1 d into the forwardmost socket.

. The operati n o my invent on wi l be ohvious from what has gonebefore.

Wi e parts a sembled, he cl an r i intended to bepushed over the carpetor other surfa e to be cleaned, th mou o the vacuum head being forcedinto contact with the surface. Asthe de ice is pllshed o er the floor, ero ler will rotate w h the cams 30 and 31, and the rotation Of thesecams will cause a reciprocation of the rollers eathe spindle 38,. hespindle 21 and t e p stons 20. lVhile one piston is drawing in air fromthe dust-collecting casing, the other piston is expelling air throughthe outlet opening. There is thus a continuous suction which 1 havefound in practicewill create a constant vacuum in the casing or chamber2. I have found in practice that this construction is extremelyeffective and that it will pick up the finest part-iclesof dust as wellas relatively coarse particles.

It will be seen that the device is very substantially built and that noleather or other flexible material is used, and that no bellows is used,the leather of which is liable to wear out under action, or to become socracked or split as to prevent avacuum being formed. Furthermore, itwill be seen that the parts may be readily disassembled to permit thepump pistons to be repacked if necessary, or the parts to be oiled orcleaned.

Again it may be pointed out that the connection between the cams and thepistons is extremely direct and positive, and that the parts may be madetherefore relatively heavy, thus eliminating any danger of the artsbending under strain.

What I claim is: 1. A device of the character described in cluding anannular traction member, a double acting pump disposed within thetraction member and including a barrelextending longitudinally of thetraction memher and having openings at its ends coinciding with the aXisof the traction member, a reciprocating piston within the barrel, meansactuated by the traction member for reciprocating said piston parallelto the aXis of the barrel and traction member, and a chamber operativelyconnected through the axis of the traction member with both ends of thepump barrel.

2, A device of the character described including in its organization anannular traction member, a double acting pump disposed within thetraction member and eX- tending transversely, and means actuated by thetraction member for actuating said 3. A device of the characterdescribed including in its organization an annular traction member,oppositely disposed cams carrise y an dispo d With n he t aetion membeand a le cting pump having opposed pistons and a barrel disposed.transversely of and within the said cams, a member operatively engagingsaid pistons and said cams to reciprocate the former .upon a rotation ofthe latter.

l; A deviceof the character described in cluding in its organizationanannular traction member, oppositely disposed cams carried by thetraction member and having cam itacesspaced from each other, a pumpbarrel disposed within the cams and having a in e n a t t p i g i each 9its end walls, valves controlling the pas;-

sage of fluid through said openings, connec- .tions extending trom -theinlet openings of t e pump to he interior o th h m er, a do ble p stonit in the pump nn cte p ndl a an v pin le engagin the first namedspindle, the extremities of said last named spindle being engaged by thecam faces of the cams;

5. A device of the character described in-.

cluding in its organization a chamber carried thereby, a tractionmember, a. pump including a pump barrel mounted within the tractionmember extending transversely of the said chamber and rearward of thesame, duct-s extending rearward from the said chamber and having tubularbearings entering the ends of the pump barrel whereby the chamber ispivotally connected to the pump barrel, and means operatively connectedto the traction member for actuating said pump.

6. A device of the character described ining pump mounted within thetraction .m-ember and including a pump cylinder having openings at itsopposite ends, means operatively connecting the pump with the tractionmember to actuate the former from the latter, tubular connections, eachhaving a portion at one end projecting into the opening of the pumpcylinder and forming a bearing for the same, the opposite end of eachconnection having a tapered portion projecting inward into the openingof the adjacent duct at the rear end of the chamber, and means ofadjusting the forward end of each connection into engagement with thecorresponding duct 01 the chamber.

7. A device of the character described including in its organization achamber having laterally opening flaring ducts at its rear end, atraction member, a pump barrel. mounted within the traction member, dou

-ble pistons spaced from each other and disposed inlet openings formedwith outstanding walls, said end walls also being formed with outletopenings, inlet and outlet valves controlling said inlet and outletopenings, tubular connections disposed one at each end of the pumpbarrel and having inwardly turned rearward extremities projecting intothe centrally disposed openings of the barrel and forming bearingstherefor, the forward ends of said connections having inwardly turnedtapered extremities engaging with the ducts projecting from the chamberand also provided with lugs extending parallel to the rearend of thechamber, and adjusting screws passing through said lugs and into thechamber.

8. A device of the character described including in its organization achamber, a traction member having the form of an annulus and disposedbehind the chamber, oppositely disposed spaced cam members hav ingadjacent cam faces and operatively connected to said annular tractionmember, a pump cyllnder disposed concentrically to the cams and withinthe same, said cylinder walls, said cams each having radial arms at oneend and a hub surrounding the outstanding wall of the ad acent end ofthe cylinder and rotatable thereon, and tubular connections, eachengaging at one end the outstanding wall of the adjacent cylinder headand at the other end having operative engagement with the adjacent endof the chamber.

In testimony whereof I affix my signature in presence of two witnesses.

CALVIN C. WVILLIAMS. [L.S.] Witnesses:

JOHN E. LEWIS, W, D. WILLIAMS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of 'latents, Washington, D. O.

